The guys at Overclocker Cafe looks at the new Thermaltake Spark 7 hsf. I'll
be honest I'm not a big fan of Thermaltake myself, but this thing looks pretty
good.

Thermaltake has fallen in love with their Smart Fan II. Truth be told, we
have too. The Smart Fan II is extremely versatile in that it allows three ways
to control the speed (air volume and noise level) so you can adjust things to
your needs at hand. The Smart Fan II on the Spark 7 is the slightly smaller
brother of the original unit. It is a 70mm jobber as opposed to the 80mm ones
you see around. Being 13% smaller restricts its raw performance somewhat.